src: deprecate AddPromiseHook()

This API was added to fill an use case that is served by `async_hooks`,
since that has `Promise` support.

Deprecate this, as the underlying `Isolate::SetPromiseHook()` may be
removed in its current form in the future.

Refs: https://docs.google.com/document/d/1g8OrG5lMIUhRn1zbkutgY83MiTSMx-0NHDs8Bf-nXxM/

PR-URL: https://github.com/nodejs/node/pull/26529


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>